Improvement in rocking or tilting-chairs



and epm.

JAMES LAMB, lor HUBBARDSTON, MASSACHUSETTS.

Letters Patent No. 107,924, dated October 4, 1870.

IMPROVEMENTv IN4 RQCKING OR TILTING-CHAIRS.`

The Schedule` referred to in these Letters Patent and making part of thesame.

To all persons to whom these presents fmayconw:l

Be it known that I, JAMES LAMB, otHubb'ardston, ofthe county ofWorcester and State of Massachusetts,'l1`a`ve made a new and usefulinvention vhaving reference to Rocking or Tilting- Chairs; and do herebydeolare the same tobe fully described in the fol- `lowing specilication,and represented in the accom-Y panying drawing, of Which- Figure 1 is aside elevation; Y Figure 2, a vertical section andy A Figure 3, a front'elevation of a chair, provided or constructed in accordance with myinvention. Y 'Y 0n February the 25th', A. D. 1868, Letters PatentNo.'74,920 lof'the United States of America were e granted to me on animproved rocking-chair, the subject of the 'claimmade therein beinganarrangement ias well as a combination of zigzag and side or leafsprings with the chairseat and base.

In carrying out my present invention, Ihave wholl y dispensed withtherleafsprings, and althoughl use springs-analogous to the zigzag srings, I do not dispose them beneath the `middle oft e chair-seat, but

I arrange ,two pairs ot' the springs in or underneath two opposite`sides of the chair-seat, cach pair being disposed at orfnear'the middleof each side of the seat, andsupported in one of the`v two top bars, ofthe leg-frame.

Each ofthe springsl now use is composed o'f a strip o 'f steel, bent ina serpentineform, as -sbown in the drawing, in which-sand i s are thetwin springs of eac-h pair, th'ey being arranged `close together, and soas to' stand or project in opposite direotionsfrom their medial verticalline, the ooncavity of one spring being next a concavity of the other;y

Eachgof the said springs, at or near its upper end, is bolted orfastened to the chair seatA, and at or'near its lower extremity, to atop bar, b, of the leg-frame B ofthe chair, l

. The seat is separate in other respects from the leg; frame, and maybeprovided with a back, C, or lsuch anda pair'of arms, D, I y

The leg-frame is composed of four legs, o c o c, connected by rungs d,and capped by two bars, b b, the whole being as represented.

There extend upward from the front'part of the leg- Y frame B, 'twoprojections or front stops, ff, and there is also extended downward fromthe rear part of the Seatframe, two other such stops, g g. The purposeof these stops is to check the seat. in its motions, lso

as to prevent the springs from becoming over-strained. In tippingforward far enough, the'seat will` come down upon thev front stops, and,when tipped back" suficiently, the back stops will bring up against theleg-frame. l

When sitting on the seat of the said" chair, a person may rock or tipthe seat backward; and lforward with greatiease. 1.

I herein make no claim tothe arrangement 'and combination of springs',the chair-seat, and base, as vl shown in the aforesaid patent No.74,920; nordo claim achair, as having its seat supported byfsrdesprings, arranged as shown in Thomas E. Warrens application for a patentled October 26, 1848; nor, as shown in J. Waites application, filedDecember.

20, 1867 unless with the springs,'as arranged at the sides, there arefront and back stops,as set forth, the

springsare soon liable to be either overstrainedor broken.

What I claim as my present invention, and as a The rocking ortilting-chair, as described, as made with the front and back stops'- f q,and with the two pairs ofserpentine springs, arranged at the oppositeparts or sides of the seat and leg-frame, and with the springs of eachpair disposed relatively to each other, as explained and represented.

' v JAMES LAMB.

Witnesses:

R. H. EDDY, J. It. SNOW.

